计算：sec[arcsin(609/641)]的值

更新时间2022-02-03 05:12:16

求(609/641)的反正弦，再求正割值

arcsin(609/641)≈71.819°

　sec［arcsin(609/641)］

≈sec71.819°

＝1/cos71.819°

≈3.205

　sec［arcsin(609/641)］

＝1/cos［arcsin(609/641)］

≈3.205